<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8"/>
    <title>Title</title>
</head>
<body>
<form action="/upload" method="post" enctype="multipart/form-data">
  请输入文件:  <input type="file" name="file"/>
    <input type="submit" value="submit"/>
</form>

</body>
</html>